Pump



j. 30, 194.5. l.. E. WILLIAMS 2,368,187

PUMP

Filed oct. 31, 1942 Patented Jan. 30, 1945 l PUMP Y Lewis Williams,ALongBleach,'Calif.,'assigner to.

-Willhoit Engineering'orporaton, Hawthorne, 4 Calif., a corporation of California Application October 31, 1942, Serial No. 464,055

4 claims. (c1. 10s- 185) This invention relates to incendiary pumps, and

4more particularly to a construction of a double acting hand-pump adapted for developing a spray of Water or other fluid under pressure foruse in extinguishing incendiary bombs or other like purposes. y It is an object of my invention to produce a hand-pump of the double acting type applicable for the development of pressure and for the dispersing of a uid through a spray nozzle or the like under pressure, which pump is adapted to be held in the hands and to take fluidfrom any suitable source, as from a pail or the like.

Another object of my invention is to provide a double acting hand-pump of portable structure and adapted to be used in the development of relatively high pressures for the spraying of water or other fluids in a ne spray under relatively high pressures.

Other objects and advantages of this invention it, is believed will be apparent from the following detailed description of a preferred embodiment thereof as illustrated in the accompanying' drawing.

In the drawing the figure is a sectional elevation of an incendiary pump embodying my invention.

In the preferred embodiment of my invention as illustrated in the accompanying drawing, the pump includes a barrel I, the opposed ends ozf which form cylinders 2 and 3 in which pistons 4 and are mounted. The pistons 4 and 5 are of like construction and each includes a disc 6 and a follower 1 between which there is mounted a cup A8 having an inturned wiping periphery 9. The pistons thus formed are secured to piston rods I0 and II. Each of the piston rods I0 and II are secured to guide discs I2 and I3 mounted to move with the pistons in the respective cylinders. The piston rods I0 and II are connected by means of links I4 and I5 to a crank I6. The crank I6 is formed with a shaft extension I1 which extends through the Wall of the barrel I. On the exterior the shaft Il is formed integral with a handle shank I8 to which an operating handle I9 is secured. The length of the shank I8 is many times the length of the crank I6 .in order to obtain the mechanical advantage of the difference in the length of the levers.

An inlet as indicated at is formed in the barrel I between the cylinders 2 and 3 and to this inlet may be secured a flexible hose 2| which may be dropped into a bucket 22 containing the liquid or fluid to be pumped.

Each off the cylinders 2 and 3 is provided with a cylinder head 23 and 24. Formed exterior of the barrel I is a conduit 25which connects the 'cylinder 2 above the piston 4 with the cylinder 3 above the piston 5. Mounted in the outlet from the cylinder to the conduit 25 is a check valveZS, and mounted in the outlet from the cylinder 3 -to the conduit 25 is a check valve` 21. The conduit 25 is formed With a threaded vneck 28 to receive a suitable nozzle 29.

The relationship of the links I4 and 7I5 with the crank I6 and the `piston rods I0 andll Iprovides that when the piston 4 ison the suction stroke, the piston 5 is on the pressure discharge stroke, andpvice versa. By this .means a double acting pump is provided which insures continuous discharge of fluid through the neck 28.

The double acting pump embodying my invention is of the portable hand-operated type and in order to permit the operator to support the pump during his actuation of the operating handle I9, a handle 30 is secured to the barrel I in position removed from the handle I 9.

The operation of the pump embodying my invention is: assuming the parts in the position as illustrated in the ligure and the handle I9 being rotated in a clockwise direction,'the piston 5 is at the lcompletion of the discharge stroke while the piston 4 is at the start of the discharge stroke. As the handle is rotated, fluid within the cylinder 2 above the piston 4 is forced by the check valve 26 through the conduit 25 and out the threaded neck 28. As the piston 5 moved toward the left, suction is developed in the cylinder 2 and the check valve 2'I is closed. Fluid from within the cylinder is then drawn by the cup 8 as the cup 8 is of flexible construction; its curved -periphery 9 moves away fromthe wall of the cylinder 3 allowing the fluid under atmospheric pressure within the barrel I to pass into the cylinder 3 because of the reduction of pressure in the cylinder 3. On continued rotation of the handle I9, the piston 5 completes its suction stroke and reverses in direction. When it reverses in direction, the fi-uid within the cylinder 3 exerts a pressure against the curved periphery 9 of the cup 8 forcing the .cup against the wall of the cylinder in fluid-tight relation, with the result that the fluid is forced by the check valve 2l and from the neck. The operation of the piston within the cylinder 2 is precisely the same as set forth with respect to the operation of the piston 5. The guides I3 may be either loosely tted within the barrel I as to permit the fluid being pumped to pass around their edges,

or may lbe formed with a plurality of fluid aper* tures such as indicated at 3l. One of the particular advantages embodying my invention is thatit provides a continuously discharging handoperated portable pump which may be used for the development of fluid under pressure to a spray nozzle for extinguishing incendiary bombs or the like. The pump may also be used as a double acting pump for the development of pressure in other uids such as air and under such conditions of use, may be used for pumping up pneumatic tires or the like.

Having fully described my invention, it is to be understood that I do not Wish to be limited to the details herein sei; forth, but my invention is of the full scope of the appended claims.

I claim:

l. In a hand pump, the combination of a barrel forming opposed cylinders, flexible cup packing pistons in said cylinders, connecting rods secured to the pistons, guide discs carried by said rods Within said barrel, a crank mounted within the barrel, links connecting the crank with said piston rods, iiuid passage means exterior to .the barrel connecting the heads of the cylinders, an inlet to the barrel between the cylinders, check valves mounted in the passage from the cylinder heads to the connecting passage, and an elon gated operating handle exterior to the barrel and connected with the crank for rotation thereof.

2. In a hand pump, the combination of a barrel forming opposed cylinders, flexible cup packing pistons in said cylinders, connecting rods secured to the pistons, guide discs carried by said rods within said barrel, a crank journaled within the barrel, links connecting the crank with the piston rods, fluid passage means exterior to the barrel connecting the heads of the cylinders, an operating crank handle for rotation of the crank, and a handle secured to the barrel at one end removed from the position of the crank.

3. In a hand pump, the combination of a barrel forming opposed cylinders, flexible cup packing pistons in said cylinders, connecting rods secured to the pistons, guide means for said rods Within the barrel, a crank mounted Within the barrel and connected through said guide means with the pistons, a uid passage exterior to the barrel connecting the heads of .the cylinders. a check valve for each of the cylinder head discharge passages to said exterior passage, and an inlet to the barrel between the cylinders.

4. In a hand pump, the combination of a barrel forming opposed cylinders, flexible `cup packing pistons in said cylinders, connecting rods secured to the pistons, guide discs carried by said rods Within said barrel, a crank mounted Within the barrel, links connecting the crank with said piston, the crank being journaled on a shaft within the barrel, an operating arm secured to the shaft exterior of the cylinder and having an operating handle secured thereto, the length of the operating arm being elongated with reference to the throw of the crank to provide for mechanical advantage of hand rotation of the operating handle with reference to the rotation of the crank.

LEWIS E. WILLIAMS. 

